Basler Electric DGC-2020 - Manual (Page 148)

F Run Period Hours: Adjustable from 0 to 23 in increments of 1.
G Run Period Minutes: Adjustable from 0 to 59 in increments of 1.
H Run with Load: Enable or Disable.
Sensing Transformers
Three sets of transformer settings configure the DGC-2020 for operation with a specific system. These
settings, along with the generator voltage, generator current, and bus voltage detected by the DGC-2020,
enable the DGC-2020 to accurately meter system values, offer generator protection, and synchronize the
generator with the bus (style number xxxxxxxAx only).
Click the Rated Data button on the Sensing Transformers screen to make changes to rated data and click
the Save button when finished. Click the Cancel button to discard changes.
Generator PT Settings
The generator PT settings establish the nominal primary A (generator side) and secondary B (DGC-2020
side) voltage levels at the generator voltage-sensing transformer.
Bus Transformer Settings
Primary and secondary bus transformer ratings are used by the automatic transfer switch function, which
monitors a single- or three-phase
∗ bus input to detect mains failure. Controllers equipped with an
automatic synchronizer (style number xxxxxxxAx) also use the primary and secondary bus transformer
ratings. The primary setting
C establishes the nominal voltage present at phases A and C of the bus. The
secondary setting D establishes the nominal voltage seen at the bus voltage input of the DGC-2020.
∗ Three-phase bus input is available to DGC-2020 hardware version 3 only.
Generator CT Settings
The generator CT setting E establishes the nominal, primary (generator side) current level at the generator
current sensing transformer. The secondary value of the generator CT is dictated by the style number F of
the controller. A DGC-2020 with a style number of 1xxxxxxxx uses a nominal CT secondary rating of 1
Aac. A DGC-2020 with a style number of 5xxxxxxxx uses a nominal CT secondary rating of 5 Aac.
The Gen CT Low Line Scale Factor setting G is used to automatically adjust the Gen CT Primary Amps
setting in applications that might utilize more than one type of genset connection. The scale factor setting
is implemented when the DGC-2020 senses a contact closure at a contact input programmed to activate
scaling of the settings. The value of the scale factor setting serves as a multiplier for the Gen CT Primary
Amps setting. For example, if a scale factor contact input is received by the DGC-2020 and the scale
factor setting is 2.000, the Gen CT Primary Amps setting will be doubled (2.000 x Gen CT Primary Amps
setting).
The BESTCOMSPlus Sensing Transformers screen is illustrated in Figure 4-31.
4-38 DGC-2020 BESTCOMSPlus
® Software
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